| 21st Kentucky Infantry Regiment | |
|---|---|
| Active | December 31, 1861, to December 9, 1865 |
| Country | United States |
| Allegiance | Union |
| Branch | Infantry |
| Engagements | Battle of Perryville Battle of Stones River Tullahoma Campaign Battle of Missionary Ridge Atlanta Campaign Battle of Resaca Battle of Kennesaw Mountain Siege of Atlanta Battle of Jonesboro Battle of Franklin Battle of Nashville |
The 21st Kentucky Infantry Regiment was an infantry regiment that served in the Union Army during the American Civil War.